What are the polishing methods for Shenzhen zinc alloy die castings?
The surface technology of Shenzhen zinc alloy die-casting parts is rich and varied, and the surface effect of Shenzhen zinc alloy die-casting parts is very beautiful. In particular, the surface effect of zinc alloy die-casting parts produced by Shenzhen Furong Precision is the most beautiful. Let us take a look at how Shenzhen Furong Precision handles the surface effects of zinc alloy die-casting castings.
Shenzhen zinc alloy die-casting parts are generally used for high-grade objects, so the market demand for Shenzhen zinc alloy die-casting parts is very large. Therefore, how to improve the quality of Shenzhen zinc alloy die-casting parts has become an important task of Shenzhen Zinc Alloy Die-casting Factory. In the manufacturing process of Shenzhen zinc alloy die-casting parts, the smooth processing and mirror processing after shape processing is called surface grinding and polishing of parts, which is an important process to improve the quality of Shenzhen zinc alloy die-casting parts. Mastering the reasonable polishing method can improve the quality and performance of Shenzhen zinc alloy die-casting parts, and thus improve the quality of Shenzhen zinc alloy die-casting products.
What kind of polishing method is used in Shenzhen Zinc Alloy Die Casting Factory?
Mechanical polishing
The mechanical polishing used in Shenzhen Zinc Alloy Die-casting Factory mainly relies on cutting or plastic deformation of the surface of the material to remove the convex part of the surface of the workpiece to obtain a smooth surface polishing method. In the polishing liquid containing abrasive, it is pressed against the machined surface. On, for high-speed rotary motion. With this technology, the surface roughness of ra 0.0088 μm can be achieved, which is the best surface roughness in various polishing methods. This method is often used in optical lens molds. Mechanical polishing is the main method of mold polishing.
2. Chemical polishing
Chemical polishing is a process in which a material in a chemical medium causes a slightly convex portion of the surface to preferentially dissolve, thereby obtaining a smooth surface. The method can polish a workpiece with a complicated shape and can polish many workpieces at the same time with high efficiency. The surface roughness obtained by chemical polishing is generally 10 μm.
3. Electropolishing
The basic principle of electropolishing is the same as chemical polishing, which is to selectively dissolve the surface of the material to make the surface smooth. Compared with chemical polishing, it can eliminate the influence of the cathode reaction and has a good effect.
4. Ultrasonic polishing
Ultrasonic polishing is a processing method that uses a tool section for ultrasonic vibration to polish a brittle hard material through an abrasive suspension. The workpiece is placed in an abrasive suspension and placed together in an ultrasonic field, and the abrasive is ground and polished on the surface of the workpiece by the action of ultrasonic waves. Ultrasonic machining has a small macroscopic force and does not cause deformation of the workpiece, but it is difficult to manufacture and install the tooling.
5. Fluid polishing
Fluid polishing relies on flowing liquid and the abrasive particles it carries to wash the surface of the workpiece for polishing purposes. Hydrodynamic grinding is driven by hydraulics. The medium is mainly made of a special compound (polymeric substance) that flows at a lower pressure and is incorporated into an abrasive. The abrasive can be made of silicon carbide powder.
6. Magnetic grinding and polishing
Magnetic grinding and polishing is the use of magnetic abrasive to form an abrasive brush under the action of a magnetic field to grind the workpiece. This method has high processing efficiency, good quality and easy control of processing conditions. With a suitable abrasive, the surface roughness of the machine can be achieved up to 0.1 μm.
7. Electric spark ultrasonic composite polishing
In order to improve the polishing speed of workpieces with surface roughness ra of 1.6μm or more, Shenzhen Zinc Alloy Die-casting Factory uses ultrasonic wave and special high-frequency narrow pulse high peak current pulse power supply for composite polishing, which is simultaneously affected by ultrasonic vibration and electric pulse corrosion. The surface of the workpiece quickly reduces the surface roughness. This is effective for polishing the rough surface of the mold after machining by car, milling, EDM and wire cutting.
